“…Propolis, a bee glue, is collected by honey bees from numerous plant flowers, and due to its unique biological attributes such as antibacterial, antifungal, and antiviral activities against several microorganisms, anti-inflammatory, antiulcer, antitumor, and immune-stimulating activities, it received great attention by the researchers and scientists [12,13]. Several studies indicated that propolis is composed of various valuable bioactive compounds such as alcohols, aldehydes, aromatic acids and esters, flavanones, flavones, hydrocarbon esters, ethers, hydroxyl and keto waxes, ketones, terpenoids, steroids, sugar, several vitamins (e.g., B, C, and E), resins, and silicon [14,15].…”